Retrofit show-spring-boot-version-diff.sh script to work with a new format of the file

[github-actions]

The puzzle 1244-070a6baf from #1244 has to be resolved:

mystamps/src/main/scripts/show-spring-boot-version-diff.sh

Line 3 in dd2b7e2

# @todo #1244 Retrofit show-spring-boot-version-diff.sh script to work with a new format of the file

Tech debt for: dd2b7e2 (#1244)

[php-coder]

A new file location: https://github.com/spring-projects/spring-boot/blob/v2.3.12.RELEASE/spring-boot-project/spring-boot-dependencies/build.gradle